Write down the structures of the following compounds:
(i) 3 - formylpentanoic acid
(ii) 3 - hydroxy - 4 - oxopentanal
(iii) 2,3 - dihydroxybutanedioic acid
(iv) 3 - hydroxycyclo - hexanone
(v) 3 - hydroxy - 3 - meyhylbutan - 2 - one

Explanation

(i) `overset(5)(C)H_(3)overset(4)(C)H_(2)overset(3)underset(CHO)underset(|)(C)H-overset(2)(C)H_(2)-overset(1)(C)OOH`
(ii) `overset(5)(C)H_(3)-overset(4)underset(O)underset(||)(C)-overset(3)underset(OH)underset(|)(C)-overset(2)(C)H_(2)-overset(1)CHO`
(iii) `HOOoverset(4)(C)-overset(3)underset(OH)underset(|)(C)-overset(2)underset(OH)underset(|)(C)-overset(1)(C)OOH`
(iv)
(v) `overset(4)(C)H_(3)-overset(OH)overset(|)underset(CH_(3))underset(|)(""^3C)-""^2CO-overset(1)(C)H_(3)`